The Lemon IndexThe other computers in the car stopped hearing from the battery energy control module.
Fix soon. Book a shop visit this week. Stop driving if the car slips, shakes, overheats or warns you.
Wiring or connector fault on the data network. Then: power or ground problem at the battery energy control module; failed battery energy control module.
Owners named U0111 in 10 complaints to the U.S. government, most often on the Toyota Prius.
Cars owners report it on
Complaints that name U0111, by model. Raw counts, not a failure rate: popular models get more complaints.
Years owners report it on most: 2008 Toyota Prius
The details
What U0111 means
The other computers in the car stopped hearing from the battery energy control module. Features that depend on it can stop working, and several warning lights often come on together.
Can I drive with U0111?
Fix soon. Book a shop visit this week. Stop driving if the car slips, shakes, overheats or warns you.
80% of the owner complaints that name U0111 also say the car warning lights and electrical faults. A complaint can describe more than one problem, so this doesn't prove the code caused it.
Common causes of U0111
- Wiring or connector fault on the data network
- Power or ground problem at the battery energy control module
- Failed battery energy control module
- Weak battery
A shop should confirm the cause with a scan and tests before replacing parts.
What owners describe
- Warning lights and electrical faults: 80% of complaints
- Stalls or shuts off: 30% of complaints
- Brakes or ABS act up: 30% of complaints
- Loses power or goes into limp mode: 20% of complaints
Share of complaints naming the code whose text also mentions each problem.
Model years that report U0111 most
2008 Toyota Prius (2).
Related codes
U0109 U0104 U0103 U0102 U0101 U0121 U0100 U0122
Quick answers
What does U0111 mean?
Lost Communication With Battery Energy Control Module "A". The other computers in the car stopped hearing from the battery energy control module. Features that depend on it can stop working, and several warning lights often come on together.
Can I drive with U0111?
Fix soon. Book a shop visit this week. Stop driving if the car slips, shakes, overheats or warns you.
What causes U0111?
Wiring or connector fault on the data network; Power or ground problem at the battery energy control module; Failed battery energy control module; Weak battery.
Counts: NHTSA owner complaints whose text names U0111. A complaint is an owner's report, not a diagnosis. Meanings: the standard SAE J2012 definitions in our own words; manufacturer codes only where verified for that make. General information, not repair advice for your car.